WO2007087886A1 - Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips, having great surface quality - Google Patents

Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips, having great surface quality Download PDF

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Publication number
WO2007087886A1
WO2007087886A1 PCT/EP2006/012459 EP2006012459W WO2007087886A1 WO 2007087886 A1 WO2007087886 A1 WO 2007087886A1 EP 2006012459 W EP2006012459 W EP 2006012459W WO 2007087886 A1 WO2007087886 A1 WO 2007087886A1
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WO
WIPO (PCT)
Prior art keywords
casting
rolling
oscillation
strand
hot
Prior art date
Application number
PCT/EP2006/012459
Other languages
German (de)
French (fr)
Inventor
Christian Bilgen
Tilmann BÖCHER
Wolfgang Henning
Jürgen GAYDOUL
Original Assignee
Sms Demag Ag
Hermetik Hydraulik Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sms Demag Ag, Hermetik Hydraulik Ab filed Critical Sms Demag Ag
Priority to CN2006800521182A priority Critical patent/CN101410198B/en
Priority to EP06841130A priority patent/EP1981660B1/en
Priority to CA2640751A priority patent/CA2640751C/en
Priority to ES06841130T priority patent/ES2389860T3/en
Priority to US12/223,410 priority patent/US20120048501A1/en
Priority to AU2006337463A priority patent/AU2006337463B2/en
Priority to MX2008009949A priority patent/MX2008009949A/en
Priority to BRPI0621300-6A priority patent/BRPI0621300A2/en
Priority to JP2008552695A priority patent/JP2009525182A/en
Publication of WO2007087886A1 publication Critical patent/WO2007087886A1/en
Priority to EG2008081309A priority patent/EG25282A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel

Definitions

  • the invention relates to a method and a casting / rolling plant for producing hot-rolled metal, in particular high-surface-area steel strip from slab or flat cast thin-cast slabs cast in the continuous casting process, which descaled on its strand surface. pe.atur heated and finished in a multi-stand hot strip rolling mill with low strip thicknesses, the cast strand after emerging from a strand guide, before entering a heat balance furnace and / or after exiting a heat equalization furnace and entering the hot 0, strip rolling mill on one or both strand surfaces by a plurality of rotating nozzles, from which pressure liquid injected repeatedly to a respective same surface location with high loading pressure, freed of scale and / or casting powder and the oscillation marks are deeply cleaned.
  • a descaling device for casting and rolling mills is known.
  • a rotatable arm is used with nozzle and retention, protection and recovery plates for the removed scale and the large amount of spray water proposed.
  • a first descaling device is known, which may consist of a scale washer of conventional design and a second descaling device with rotating nozzles.
  • the invention has for its object, in addition to the application of the rotating Entzunderns previously included not included parameters that are given by the continuous casting.
  • the stated object is achieved according to the invention in combination with the genus specified in the introduction by driving the hydraulically oscillated continuous casting mold in several different oscillation curves and by performing the deep cleaning of the oscillation marks by setting the oscillation profile determined as optimal for each casting material.
  • the advantages are that in addition to the actual descaling now the oscillation marks can be cleaned very largely and thus a finish rolling on ultrathin Endwalzdicken equal / smaller 1, 2 mm is favored. This means that, for example, for these dimensions, finish rolling in the austenite region of the crystal structure is possible.
  • the pressurization of the rotating nozzles with printing fluid by significantly less pressure medium than hitherto has been used in so-called.
  • Tinder scrubbers with the same parameters of the casting or rolling process.
  • printing medium such as, for example, water
  • the associated casting-rolling plant in particular a compact-casting-rolling plant (CSP), consisting of a continuous casting for liquid metals, in particular for liquid steel materials
  • the continuous casting mold is connected to a hydraulic oscillation drive, in the strand discharge at least a strand guide, a temperature compensation furnace, possibly a furnace ferry and a multi-stand hot strip finishing train and a reel follow, is further developed such that between the strand guide and the temperature compensation furnace or between a straightening and scissors and / or between the temperature compensation furnace and de warming belt finishing mill a device is arranged with rotating nozzles, from which a pressure medium with high applied pressure is repeatedly directed to a respective same surface location.
  • a plurality of nozzles for pressure medium are arranged on a rotor.
  • Another embodiment provides that a plurality of rotors are arranged with arranged on the rotor circumference nozzles for pressure medium in a row transverse to the course of the casting or rolling train.
  • the previously used Abspritzbalken the scale scrubber can be replaced individually or completely.
  • the use of rotor descaling on a hot strip rolling mill having seven or more finishing stands is provided prior to entry into the first finish rolling mill.
  • Fig. 1 is a casting-rolling compact plant in a perspective side view
  • Fig. 2 is located in a compact protective housing continuous casting mold with hydraulic oscillation drive
  • FIG. 3 shows several diagrams of different oscillatory movements of the continuous casting mold and FIG. 4 shows a single rotor with nozzles arranged on the rotor circumference.
  • a casting / rolling plant 1 which in particular represents a CSP plant (Compact Steel Plant), consists of a continuous casting apparatus 2, in which liquid metal, in particular liquid steel material, is cast by means of a continuous casting mold 9.
  • the continuous casting mold 9 is provided with a hydraulically oscillating drive 9a (FIG. 2).
  • On the continuous casting mold 9 follows in strand withdrawal direction 11, a strand guide 3, a temperature compensation furnace 4, if provided, a furnace ferry 5 and a multi-stand hot strip finishing train 6 and behind a reel 8 for winding the tape. 7
  • a device 14 with rotating nozzles 15 (FIG. 4) is arranged, from which pressure media (usually liquid, such as, for example, water) is repeatedly directed to a respective same surface area with a high pressure.
  • pressure media usually liquid, such as, for example, water
  • FIG. 3 the hydraulically oscillating continuous casting mold 9 is moved in a plurality of different oscillation curves 16, 17, 18, so that a respectively different oscillation profile 16a, 17a, 18a is produced for the respectively selected casting material.
  • the oscillation curves 16, 17, 18 can be due to different Kokillenhübe, different casting speed, unleading leading mold speeds on the downstroke (so-called negative strip) different waveforms (eg, sinusoids) u. Like. Be obtained.
  • the pressurization of the rotating nozzles 15 with hydraulic fluid 19 can be done with significantly less pressure medium (pressure medium) than has been used in so-called. Zundericaschern, where equal ratios, ie parameters of the opposing processes are based.
  • pressurizing the rotary nozzles 15 with pressure medium keeps the temperature losses of the casting strand 2b as low as possible.
  • a plurality of nozzles 15 for the printing medium are combined on a rotor 20 (FIG. 4) and a plurality of rotors 20 have nozzles 15 for printing medium mounted on the rotor periphery 20a and are arranged in a row of nozzles 21 transversely to the course of the casting or rolling train 2b arranged. Advantages also result from a plurality of such rows of nozzles 21, smaller nozzle jets than can be used in a single row of nozzles 21.
  • the rotor descaling may be applied to a hot strip rolling mill 6 having seven or more finish rolling stands 6a prior to the entry of the rolled strip into the first finish rolling stand 6a.

Abstract

Disclosed are a method and a casting/rolling plant for producing hot-rolled metallic, particularly steel, strips (7) having great surface quality from slabs or flat thin bars (2, 2a) that are cast in a continuous casting process, descaling being performed based on a rotary descaling process. In order to take into account parameters which are not considered in prior art in addition to rotary descaling, the hydraulically oscillated permanent mold (9) travels along several different oscillation curves (16, 17, 18) while the oscillation marks are deep-cleaned by adjusting the oscillation pattern that is determined to be optimal for each casting material.

Description

VERFAHREN UND GIESS-WALZ-ANLAGE ZUM HERSTELLEN VON WARMGEWALZTEM METALLBAND, INSBESONDERE STAHLWERKSTOFFBAND, MIT HOHER OBERFLÄCHENGÜTEMETHOD AND CASTING ROLLING SYSTEM FOR PRODUCING HOT-ROLLED METAL RIBBON, PARTICULARLY STEEL MATERIAL RIBBON, HIGH SURFACE QUALITY
00
Die Erfindung betrifft ein Verfahren und eine Gieß-Walz-Anlage zum Herstellen von warmgewalztem Metall-, insbesondere Stahlwerkstoff-Band mit hoher O- berflächengüte aus im Stranggießverfahren gegossenen Brammen- oder fla- 5 chen Dünnsträngen, das an seiner Strangoberfläche entzundert, auf Walztem- pe.atur erwärmt und in einer mehrgerüstigen Warmband-Walzstraße mit geringen Banddicken fertiggewalzt wird, wobei der Gießstrang nach Austreten aus einer Strangführung, vor Eintreten in einen Wärmeausgleichsofen und / oder nach Austreten aus einem Wärmeausgleichofen und Einlaufen in die Warm- 0 ,band-Walzstraße an einer oder beiden Strangoberflächen durch mehrere rotierende Düsen, aus denen Druckflüssigkeit wiederkehrend auf eine jeweils gleiche Oberflächenstelle mit hohem Beaufschlagungsdruck gespritzt, von Zunder und / oder Gießpulver befreit und die Oszillationsmarken tiefgereinigt werden.The invention relates to a method and a casting / rolling plant for producing hot-rolled metal, in particular high-surface-area steel strip from slab or flat cast thin-cast slabs cast in the continuous casting process, which descaled on its strand surface. pe.atur heated and finished in a multi-stand hot strip rolling mill with low strip thicknesses, the cast strand after emerging from a strand guide, before entering a heat balance furnace and / or after exiting a heat equalization furnace and entering the hot 0, strip rolling mill on one or both strand surfaces by a plurality of rotating nozzles, from which pressure liquid injected repeatedly to a respective same surface location with high loading pressure, freed of scale and / or casting powder and the oscillation marks are deeply cleaned.
5 Ein solches Verfahren ist ähnlich aus der DE 43 28 303 C2 bekannt. Allerdings wird dort nicht von einem stranggegossenen Brammen- oder Dünnbrammen- Querschnitt ausgegangen und die Rotorentzunderung ist im wesentlichen auf Walzgut angewendet und berücksichtigt somit nicht das besondere Herstellverfahren durch Stranggießen. Außerdem reicht die Abtragungstiefe nicht aus, ne- ben unsichtbarem Zunder auch jede herstellbedingte Oszillationsmarke zu erfassen. Daneben wird durch eine sehr hohe Wassermenge eine unerwünscht hohe Abkühlung des Walzgutes bewirkt.5 Such a method is similarly known from DE 43 28 303 C2. However, it is not assumed that there is a continuously cast slab or thin slab cross section and the rotor descaling is essentially applied to rolling stock and thus does not take into account the special manufacturing process by continuous casting. In addition, the depth of ablation is not sufficient, in addition to invisible tinder, to detect any oscillation mark caused by the manufacture. In addition, caused by a very high amount of water an undesirably high cooling of the rolling stock.
Aus der EP 0 586 823 B1 ist eine Entzunderungsvorrichtung für Gieß- und Walzstraßen bekannt. Dabei wird eine drehbarer Arm mit Düse eingesetzt und Zurückhalte-, Schutz- und Rückgewinnungsplatten für den abgetragenen Zunder und die große Menge des Spritzwassers vorgeschlagen. Aus der EP O 625 383 B1 ist eine erste Entzunderungseinrichtung bekannt, die aus einem Zunderwäscher herkömmlicher Bauart bestehen kann und eine zweite Entzunderungseinrichtung mit rotierenden Düsen.From EP 0 586 823 B1 a descaling device for casting and rolling mills is known. In this case, a rotatable arm is used with nozzle and retention, protection and recovery plates for the removed scale and the large amount of spray water proposed. From EP 0 625 383 B1 a first descaling device is known, which may consist of a scale washer of conventional design and a second descaling device with rotating nozzles.
Aus der EP 0 611 610 B1 ist eine Rotorentzunderung mit geringem Wasser- verbrauch bekannt, die einen geringeren Temperaturabfall des Walzgutes bewirken soll.From EP 0 611 610 B1 a rotor descaling with low water consumption is known which is intended to bring about a smaller temperature drop of the rolling stock.
Der Erfindung liegt die Aufgabe zugrunde, neben der Anwendung des rotierenden Entzunderns bisher nicht berücksichtigte Parameter einzubeziehen, die durch das Stranggießen gegeben sind.The invention has for its object, in addition to the application of the rotating Entzunderns previously included not included parameters that are given by the continuous casting.
Die gestellte Aufgabe wird in Kombination mit der eingangs bezeichneten Gattung erfmdungsgemäß dadurch gelöst, dass die hydraulisch oszillierte Stranggießkokille in mehreren unterschiedlichen Oszillationskurven gefahren wird und dass die tiefe Reinigung der Oszillationsmarken durch Einstellen des als optimal für jeden Gießwerkstoff ermittelten Oszillationsverlaufs durchgeführt wird. Die Vorteile sind , dass neben dem eigentlichen Entzundern jetzt noch die Oszillationsmarken sehr weitgehend gereinigt werden können und dadurch ein Fertigwalzen auf ultradünne Endwalzdicken gleich / kleiner 1 ,2 mm begünstigt wird. Das bedeutet, dass bspw. für diese Abmessungen das Fertigwalzen im Austenitgebiet der Kristallstruktur möglich ist.The stated object is achieved according to the invention in combination with the genus specified in the introduction by driving the hydraulically oscillated continuous casting mold in several different oscillation curves and by performing the deep cleaning of the oscillation marks by setting the oscillation profile determined as optimal for each casting material. The advantages are that in addition to the actual descaling now the oscillation marks can be cleaned very largely and thus a finish rolling on ultrathin Endwalzdicken equal / smaller 1, 2 mm is favored. This means that, for example, for these dimensions, finish rolling in the austenite region of the crystal structure is possible.
In Ausgestaltung ist vorgesehen, dass das Beaufschlagen der rotierenden Düsen mit Druckflüssigkeit durch deutlich weniger Druckmedium erfolgt als bisher in sog. Zunderwäschern aufgewendet worden ist, bei gleichen Parametern des Gieß- oder Walzprozesses. Dadurch kann bei gleicher oder besserer Entzunde- rungswirkung an Druckmedium, wie bspw. Wasser, gespart werden.In an embodiment, it is provided that the pressurization of the rotating nozzles with printing fluid by significantly less pressure medium than hitherto has been used in so-called. Tinder scrubbers, with the same parameters of the casting or rolling process. As a result, with the same or better descaling effect on printing medium, such as, for example, water, can be saved.
Nach weiteren Merkmalen ist vorgesehen, dass über ein hinsichtlich des Temperaturniveaus des Gieß- oder Walzstrangs geregeltes Beaufschlagen der ro- tierenden Düsen mit Druckmedium die Temperaturverluste des Gießstrangs niedrig gehalten werden. Dadurch findet eine Verringerung der Temperaturverluste der Brammen und Dünnstränge statt, womit wesentlich bessere Bedingungen für das Warmwalzen der ultradünnen Endwalzdicken und Energie- Ersparnis verbunden sind.According to further features, it is provided that, via a pressurization of the roughness controlled in relation to the temperature level of the casting or rolling train. ting nozzles with pressure medium, the temperature losses of the casting strand are kept low. As a result, a reduction in the temperature losses of the slabs and thin strands takes place, which is associated with much better conditions for the hot rolling of the ultra-thin Endwalzdicken and energy savings.
Die zugehörige Gieß-Walz-Anlage, insbesondere eine Kompakt-Gieß-Walz- Anlage (CSP), bestehend aus einer Stranggießvorrichtung für flüssige Metalle, insbesondere für flüssige Stahlwerkstoffe, deren Stranggießkokille mit einem hydraulischen Oszillationsantrieb verbunden ist, auf die in Strangabzugsrich- tung zumindest eine Strangführung, ein Temperaturausgleichsofen, ggf. eine Ofenfähre und eine mehrgerüstige Warmband-Fertigwalzstraße und ein Haspel folgen, ist dahingehend weiterentwickelt, dass zwischen der Strangführung und dem Temperaturausgleichsofen bzw. zwischen einem Richttreiber und einer Schere und / oder zwischen dem Temperaturausgleichsofen und de Warm- band-Fertigwalzstraße eine Einrichtung mit rotierenden Düsen angeordnet ist, aus denen ein Druckmedium mit hohem Beaufschlagungsdruck wiederkehrend auf eine jeweils gleiche Oberflächenstelle gerichtet ist. Dadurch können die beschriebenen Wirkungen des Verfahrens erzeugt werden.The associated casting-rolling plant, in particular a compact-casting-rolling plant (CSP), consisting of a continuous casting for liquid metals, in particular for liquid steel materials, the continuous casting mold is connected to a hydraulic oscillation drive, in the strand discharge at least a strand guide, a temperature compensation furnace, possibly a furnace ferry and a multi-stand hot strip finishing train and a reel follow, is further developed such that between the strand guide and the temperature compensation furnace or between a straightening and scissors and / or between the temperature compensation furnace and de warming belt finishing mill a device is arranged with rotating nozzles, from which a pressure medium with high applied pressure is repeatedly directed to a respective same surface location. Thereby, the described effects of the method can be generated.
Wie in anderem Zusammenhang bekannt ist, sind mehrere Düsen für Druckmedium an einem Rotor angeordnet. Es ist jedoch vorteilhaft, solche Düsen auch für andere Medien als Wasser von Normaltemperatur vorzusehen.As is known in other contexts, a plurality of nozzles for pressure medium are arranged on a rotor. However, it is advantageous to provide such nozzles for other media than water of normal temperature.
Eine andere Ausgestaltung sieht vor, dass mehrere Rotoren mit am Rotor- Umfang angeordneten Düsen für Druckmedium in einer Reihe quer zum Verlauf des Gieß- oder Walzstrangs angeordnet sind. Dadurch können die bisher verwendeten Abspritzbalken der Zunderwäscher einzeln oder vollständig ersetzt werden. Schließlich ist die Anwendung der Rotor-Entzunderung auf eine Warmband- Walzstraße mit sieben oder mehr Fertigwalzgerüsten jeweils vor dem Eintritt in das erste Fertigwalzgerüst vorgesehen.Another embodiment provides that a plurality of rotors are arranged with arranged on the rotor circumference nozzles for pressure medium in a row transverse to the course of the casting or rolling train. As a result, the previously used Abspritzbalken the scale scrubber can be replaced individually or completely. Finally, the use of rotor descaling on a hot strip rolling mill having seven or more finishing stands is provided prior to entry into the first finish rolling mill.
In der Zeichnung sind Ausführungsbeispiele der erfindungsgemäßen Merkmale dargestellt, die nachstehend noch näher erläutert werden.In the drawings, embodiments of the features of the invention are shown, which will be explained in more detail below.
Es zeigen:Show it:
Fig. 1 eine Gieß-Walz-Kompakt-Anlage in perspektivischer Seitenansicht, Fig. 2 eine in einem kompakten Schutzgehäuse befindliche Stranggießkokille mit hydraulischem Oszillationsantrieb,1 is a casting-rolling compact plant in a perspective side view, Fig. 2 is located in a compact protective housing continuous casting mold with hydraulic oscillation drive,
Fig. 3 mehrere Diagramme von unterschiedlichen Oszillationsbewegungen der Stranggießkokille und Fig. 4 einen einzelnen Rotor mit am Rotorumfang angeordneten Düsen.3 shows several diagrams of different oscillatory movements of the continuous casting mold and FIG. 4 shows a single rotor with nozzles arranged on the rotor circumference.
Eine Gieß-Walz-Anlage 1 (Fig. 1 ) , die insbesondere eine CSP-Anlage (Compact Steel Plant) darstellt, besteht aus einer Stranggießvorrichtung 2, in der flüssiges Metall, insbesondere flüssiger Stahlwerkstoff, mittels einer Stranggießkokille 9 vergossen wird. Die Stranggießkokille 9 ist mit einem hydraulisch oszillierenden Antrieb 9a (Fig. 2) versehen. Auf die Stranggießkokille 9 folgt in Strangabzugsrichtung 11 eine Strangführung 3, ein Temperaturausgleichsofen 4, falls vorgesehen, eine Ofenfähre 5 und eine mehrgerüstige Warmband- Fertigwalzstraße 6 und dahinter ein Haspel 8 zum Aufwickeln des Bandes 7.A casting / rolling plant 1 (FIG. 1), which in particular represents a CSP plant (Compact Steel Plant), consists of a continuous casting apparatus 2, in which liquid metal, in particular liquid steel material, is cast by means of a continuous casting mold 9. The continuous casting mold 9 is provided with a hydraulically oscillating drive 9a (FIG. 2). On the continuous casting mold 9 follows in strand withdrawal direction 11, a strand guide 3, a temperature compensation furnace 4, if provided, a furnace ferry 5 and a multi-stand hot strip finishing train 6 and behind a reel 8 for winding the tape. 7
Zwischen der Strangführung 3 und dem Temperaturausgleichsofen 4 bzw. zwischen einem Richttreiber 12 mit Schere 13 und / oder zwischen dem Tempera- turausgleichssofen 4 und der Warmband-Fertigwalzstraße 6 ist eine Einrichtung 14 mit rotierenden Düsen 15 (Fig. 4) angeordnet, aus denen Druckmedien ( meist Flüssigkeit, wie bspw. Wasser) mit hohem Beaufschlagungsdruck wieder- kehrend auf eine jeweils gleiche Oberflächenstelle gerichtet ist. Gemäß Fig. 3 wird die hydraulisch oszillierende Stranggießkokille 9 in mehreren unterschiedlichen Oszillationskurven 16, 17, 18 bewegt, so dass für den jeweils ausgewählten Gießwerkstoff ein jeweils unterschiedlicher Oszillationsverlauf 16a, 17a, 18a entsteht. Die Oszillationskurven 16, 17, 18 können durch unterschiedliche Kokillenhübe, unterschiedliche Gießgeschwindigkeit, unterschied- lieh voreilende Kokillengeschwindigkeiten beim Abwärtshub ( sog. Negativ- Strip) unterschiedliche Kurvenformen ( bspw. Sinusschwingungen) u. dgl. erhalten werden. Das Beaufschlagen der rotierenden Düsen 15 mit Druckflüssigkeit 19 kann mit deutlich weniger Druckmittel (Druckmedium) erfolgen als bisher in sog. Zunderwäschern aufgewendet worden ist, wobei gleich Verhältnisse, d.h. Parameter der sich gegenüberstehenden Prozesse zugrunde gelegt werden. Gleichzeitig wird über ein hinsichtlich des einzuhaltenden Temperaturniveaus des Gieß- oder Walzstrangs (2b) das Beaufschlagen der rotierenden Düsen 15 mit Druckmedium die Temperaturverluste des Gießstrangs 2b so niedrig wie möglich gehalten.Between the strand guide 3 and the temperature compensation furnace 4 or between a straightening driver 12 with scissors 13 and / or between the temperature compensation furnace 4 and the hot strip finishing train 6, a device 14 with rotating nozzles 15 (FIG. 4) is arranged, from which pressure media (usually liquid, such as, for example, water) is repeatedly directed to a respective same surface area with a high pressure. According to FIG. 3, the hydraulically oscillating continuous casting mold 9 is moved in a plurality of different oscillation curves 16, 17, 18, so that a respectively different oscillation profile 16a, 17a, 18a is produced for the respectively selected casting material. The oscillation curves 16, 17, 18 can be due to different Kokillenhübe, different casting speed, unleading leading mold speeds on the downstroke (so-called negative strip) different waveforms (eg, sinusoids) u. Like. Be obtained. The pressurization of the rotating nozzles 15 with hydraulic fluid 19 can be done with significantly less pressure medium (pressure medium) than has been used in so-called. Zunderwäschern, where equal ratios, ie parameters of the opposing processes are based. At the same time, with regard to the temperature level of the casting or rolling train (2b) to be observed, pressurizing the rotary nozzles 15 with pressure medium keeps the temperature losses of the casting strand 2b as low as possible.
Mehrere Düsen 15 für das Druckmedium sind an einem Rotor 20 (Fig. 4) zu- sammengefasst und mehrere Rotoren 20 weisen am Rotor-Umfang 20a befestigte Düsen 15 für Druckmedium auf und sind in einer Düsenreihe 21 quer zum Verlauf des Gieß- oder Walzstrangs 2b angeordnet. Vorteile ergeben sich auch aus mehreren solcher Düsenreihen 21 , wobei kleinere Düsenstrahlen als bei nur einer einzigen Düsenreihe 21 eingesetzt werden können.A plurality of nozzles 15 for the printing medium are combined on a rotor 20 (FIG. 4) and a plurality of rotors 20 have nozzles 15 for printing medium mounted on the rotor periphery 20a and are arranged in a row of nozzles 21 transversely to the course of the casting or rolling train 2b arranged. Advantages also result from a plurality of such rows of nozzles 21, smaller nozzle jets than can be used in a single row of nozzles 21.
Die Rotor-Entzunderung kann auf eine Warmband-Walzstraße 6 mit sieben o- der mehr Fertigwalzgerüste 6a vor dem Eintritt des Walzbandes in das erste Fertigwalzgerüst 6a angewendet werden. BezugszeichenlisteThe rotor descaling may be applied to a hot strip rolling mill 6 having seven or more finish rolling stands 6a prior to the entry of the rolled strip into the first finish rolling stand 6a. LIST OF REFERENCE NUMBERS
1 CSP-Anlage (Compact Steel Plant)1 CSP plant (Compact Steel Plant)
2 Brammenprofil 2a Dünnstrangprofil 2b Gießstrang2 Slab profile 2a Thin section profile 2b Casting strand
2c Strangoberfläche2c strand surface
3 Strangführung3 strand guide
4 Temperaturausgleichsofen4 temperature compensation oven
5 Ofenfähre 6 Warmbandwalzstraße5 kiln ferry 6 hot strip rolling mill
6a Fertigwalzgerüst6a finish rolling stand
7 Stahlwerkstoffband7 steel material band
8 Haspel8 reel
9 hydraulisch oszillierte Stranggießkokille 9a Oszillations-Antrieb9 hydraulically oscillated continuous casting mold 9a oscillation drive
10 Oszillationskurve10 oscillation curve
11 Strangabzugsrichtung11 strand withdrawal direction
12 Richttreiber12 guide drivers
13 Schere 14 Einrichtung mit rotierenden Düsen13 Scissors 14 Device with rotating nozzles
15 rotierende Düse15 rotating nozzle
16 Oszillationskurve16 oscillation curve
16a Verlauf der Oszillationskurve16a Course of the oscillation curve
17 Oszillationskurve 17a Verlauf der Oszillationskurve17 Oscillation curve 17a Course of the oscillation curve
18 Oszillationskurve18 oscillation curve
18a Verlauf der Oszillationskurve18a Course of the oscillation curve
19 Druckflüssigkeit19 hydraulic fluid
20 Rotor 20a Rotor-Umfang20 rotor 20a rotor circumference
21 Reihe aus Rotoren 21 row of rotors

Claims

Patentansprüche: claims:
1. Verfahren zum Herstellen von warmgewalztem Metall-, insbesondere Stahlwerkstoff-Band (7) mit hoher Oberflächengüte aus im Stranggieß- verfahren gegossenen Brammen- oder flachen Dünnsträngen (2, 2a), das an seiner1. A method for producing hot rolled metal, in particular high-quality steel strip (7) from slab or flat thin strands cast in the continuous casting process (2, 2a), which is at its
Strangoberfläche (2c) entzundert, auf Walztemperatur erwärmt und in einer mehrgerüstigen Warmband-Walzstraße (6) mit geringen Banddicken fertiggewalzt wird, wobei der Gießstrang (2a) nach Austreten aus einer Strangführung (3), vor Eintreten in einen Wärmeausgleichsofen (4) und / oder nach Austreten aus einem Wärmeausgleichsofen (4) und Einlaufen in die Warmband-Walzstraße (6) an einer oder beiden Strangoberflächen (2c) durch mehrere rotierende Düsen (15), aus denen Druckflüssigkeit (19) wiederkehrend auf eine jeweils gleiche Oberflächenstelle mit hohem Beaufschlagungsdruck gespritzt, von Zunder und / oder Gießpulver befreit und die Oszillationsmarken tiefgereinigt werden, dadurch gekennzeichnet, dass die hydraulisch oszillierte Stranggießkokille (9) in mehreren unterschiedlichen Oszillationskurven (16, 17, 18) gefahren wird und dass die tiefe Reinigung der Oszillationsmarken durch Einstellen des als optimal für jeden Gießwerkstoff ermittelten Oszillationsverlaufes (16a, 17a, 18a) durchgeführt wird.Descaled surface, (2c) desalted, heated to rolling temperature and finish rolled in a multi-stand hot strip rolling mill (6) of low strip thickness, the casting strand (2a) emerging from a strand guide (3), entering a heat balance furnace (4) and / or after emerging from a heat balance furnace (4) and entering the hot strip mill train (6) at one or both strand surfaces (2c) by a plurality of rotating nozzles (15) from which pressurized fluid (19) returns to a respective same surface location with high apply pressure sprayed, freed of scale and / or casting powder and the oscillation marks are deeply cleaned, characterized in that the hydraulically oscillated continuous casting mold (9) in several different oscillation curves (16, 17, 18) is driven and that the deep cleaning of the oscillation marks by adjusting the as optimally determined for each casting material oscillation course (16a , 17a, 18a) is performed.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das Beaufschlagen der rotierenden Düsen (15) mit Druckflüssigkeit (19) durch deutlich weniger Druckmedium erfolgt als bisher in sog. Zunderwäschern aufgewendet worden ist, bei gleichen Parametern des Gieß- oder Walzprozesses.2. The method according to claim 1, characterized in that the pressurization of the rotating nozzle (15) with pressurized fluid (19) is carried out by significantly less pressure medium than previously used in so-called. Tinder scrubbers, with the same parameters of the casting or rolling process.
3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass über ein hinsichtlich des Temperaturniveaus des Gieß- oder Walzstrangs (2b) geregeltes Beaufschlagen der rotierenden Düsen (15) mit Druckmedium, die Temperaturverluste des Gießstrangs (2b) niedrig gehalten werden.3. The method according to any one of claims 1 or 2, characterized in that the temperature losses of the casting strand (2b) are kept low by means of pressurizing the rotating nozzles (15) controlled with regard to the temperature level of the casting or rolling train (2b).
4. Gieß-Walz-Anlage (1 ), insbesondere Kompakt-Gieß-Walz-Anlage (CSP), bestehend aus einer Stranggießvorrichtung (2) für flüssige Metalle, insbesondere für flüssige Stahlwerkstoffe, deren Stranggießkokille (9) mit einem hydraulischen Oszillationsantrieb (9a) verbunden ist, auf die in Strangabzugsrichtung (11 ) zumindest eine Strangführung (3) , ein Tem- peraturausgleichsofen (4), ggf. eine Ofenfähre (5) und eine mehrgerüsti- ge Warmband-Fertigwalzstraße (6) und ein Haspel (8) folgen, dadurch gekennzeichnet, dass zwischen der Strangführung (3) und dem Temperaturausgleichsofen (4) bzw. zwischen einem Richttreiber (12) und einer Schere (13) und / oder zwischen dem Temperaturausgleichsofen (4) und der Warmband-Fertigwalzstraße (6) eine Einrichtung (14) mit rotierenden Düsen (15) angeordnet ist, aus denen Druckmedium mit hohem Beaufschlagungsdruck wiederkehrend auf eine jeweils gleiche Oberflächenstelle gerichtet ist.4. casting-rolling plant (1), in particular compact-casting-rolling plant (CSP), consisting of a continuous casting apparatus (2) for liquid metals, in particular for liquid steel materials whose continuous casting mold (9) with a hydraulic oscillation drive (9a At least one strand guide (3), a temperature compensation furnace (4), optionally a furnace ferry (5) and a multi-stand hot-rolled strip mill (6) and a reel (8) are connected in the strand withdrawal direction (11). follow, characterized in that between the strand guide (3) and the temperature compensation furnace (4) or between a straightening driver (12) and a pair of scissors (13) and / or between the temperature compensation furnace (4) and the hot strip finishing train (6) Device (14) with rotating nozzles (15) is arranged, from which pressure medium is directed at a high loading pressure recurring on a respective same surface location.
5. Gieß-Walz-Anlage nach Anspruch 4, dadurch gekennzeichnet, dass mehrere Düsen (15) für Druckmedium an einem Rotor (20) angeordnet sind.5. Cast-rolling plant according to claim 4, characterized in that a plurality of nozzles (15) for pressure medium are arranged on a rotor (20).
6. Gieß-Walz-Anlage nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass mehrere Rotoren (20) mit am Rotor-Umfang (20a) angeordneten Düsen (15) für Druckmedium in einer Reihe (21 ) quer zum Verlauf des Gieß- oder Walzstrangs (2b) angeordnet sind. Gieß-Walz-Anlage nach einem der Ansprüche 4 bis 6, gekennzeichnet durch die Anwendung der Rotorentzunderung auf eine Warmband- Walzstraße (6) mit sieben oder mehr Fertigwalzgerüsten (6a) vor dem Eintritt in das erste Fertigwalzgerüst (6a ). 6. Casting-rolling plant according to one of claims 4 or 5, characterized in that a plurality of rotors (20) arranged on the rotor periphery (20 a) nozzles (15) for pressure medium in a row (21) transversely to the course of the casting - or roll train (2b) are arranged. Casting-rolling plant according to one of Claims 4 to 6, characterized by the use of rotor descaling on a hot strip rolling train (6) with seven or more finish rolling stands (6a) prior to entry into the first finishing stand (6a).
PCT/EP2006/012459 2006-02-02 2006-12-22 Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips, having great surface quality WO2007087886A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
CN2006800521182A CN101410198B (en) 2006-02-02 2006-12-22 Method and casting/rolling plant for the production of hot-rolled metallic strips with high surface quality
EP06841130A EP1981660B1 (en) 2006-02-02 2006-12-22 Method for the production of hot-rolled metallic strips, especially steel strips, having great surface quality
CA2640751A CA2640751C (en) 2006-02-02 2006-12-22 Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips, having great surface quality
ES06841130T ES2389860T3 (en) 2006-02-02 2006-12-22 Procedure for the production of hot rolled metal bands, in particular of steel bands with a large amount of surface
US12/223,410 US20120048501A1 (en) 2006-02-02 2006-12-22 Method and Casting/Rolling Plant for the Production of Hot-Rolled Metallic Strips, Especially Steel Strips, Having Great Surface Quality
AU2006337463A AU2006337463B2 (en) 2006-02-02 2006-12-22 Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips, having great surface quality
MX2008009949A MX2008009949A (en) 2006-02-02 2006-12-22 Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips, having great surface quality.
BRPI0621300-6A BRPI0621300A2 (en) 2006-02-02 2006-12-22 foundry / rolling process and installation for the production of hot rolled metal strip, especially steel strip, with excellent surface quality
JP2008552695A JP2009525182A (en) 2006-02-02 2006-12-22 Hot rolling metal with high surface quality, especially steel strip manufacturing method and casting rolling equipment
EG2008081309A EG25282A (en) 2006-02-02 2008-08-03 Method and casting/rolling plant for the production of hot-rolled metallic strips, especially steel strips.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006004688A DE102006004688A1 (en) 2006-02-02 2006-02-02 Method and casting-rolling plant for producing hot-rolled metal - in particular high-quality steel-material strip
DE102006004688.9 2006-02-02

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WO2007087886A1 true WO2007087886A1 (en) 2007-08-09

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EP (1) EP1981660B1 (en)
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KR (1) KR20080106891A (en)
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AU (1) AU2006337463B2 (en)
BR (1) BRPI0621300A2 (en)
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DE (1) DE102006004688A1 (en)
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ES (1) ES2389860T3 (en)
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UA (1) UA95100C2 (en)
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CN111570525A (en) * 2020-05-08 2020-08-25 马鞍山钢铁股份有限公司 Hot-charging method optimally matched with casting blank quality

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CN106180218A (en) * 2014-12-05 2016-12-07 财团法人金属工业研究发展中心 Device and method for removing rust and retaining water of hot-rolled steel billet
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RU2748536C2 (en) * 2017-01-24 2021-05-26 Прайметалз Текнолоджиз Аустриа ГмбХ Casting and rolling plant and method for processing billets through such installation
KR102170939B1 (en) * 2018-11-27 2020-10-29 주식회사 포스코 Rolling material processing equipment and processing method
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JP2009525182A (en) 2009-07-09
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EG25282A (en) 2011-12-05
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EP1981660B1 (en) 2012-07-04
CN101410198A (en) 2009-04-15
KR20080106891A (en) 2008-12-09
EP1981660A1 (en) 2008-10-22
US20120048501A1 (en) 2012-03-01
AU2006337463A1 (en) 2007-08-09
RU2414978C2 (en) 2011-03-27
TWI381894B (en) 2013-01-11
CA2640751A1 (en) 2007-08-09
ZA200805313B (en) 2009-09-30
BRPI0621300A2 (en) 2011-07-05
CA2640751C (en) 2013-03-12
TW200732060A (en) 2007-09-01
DE102006004688A1 (en) 2007-08-16
UA95100C2 (en) 2011-07-11
MX2008009949A (en) 2009-01-16
CN101410198B (en) 2011-08-10
ES2389860T3 (en) 2012-11-02
AR059290A1 (en) 2008-03-26

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